<style scoped>
h2 {
  text-align: center;
  padding: 30px;
  font-size: 18px;
}
#chart_example {
  width: 90%;
  height: 700px;
  /*border: 1px solid red;*/
  margin: 0 auto;
}
</style>
<template>
  <div>
    <el-card>
      <div id="chart_example"></div>
    </el-card>
  </div>
</template>

<script>
import * as echarts from "echarts";
// Generate data
let category = [];
let dottedBase = +new Date();
let lineData = [];
let barData = [];
for (let i = 0; i < 20; i++) {
  let date = new Date((dottedBase += 3600 * 24 * 1000));
  category.push(
    [date.getFullYear(), date.getMonth() + 1, date.getDate()].join("-")
  );
  let b = Math.random() * 200;
  let d = Math.random() * 200;
  barData.push(b);
  lineData.push(d + b);
}
export default {
  name: "Chart",
  data() {
    return {};
  },
  mounted() {
    let myChart = echarts.init(document.getElementById("chart_example"));
    //let option = {
    //  color: ['#f44'],
    //  tooltip : {
    //    trigger: 'axis',
    //    axisPointer : {
    //      type : 'shadow'
    //    }
    //  },
    //  xAxis : [
    //    {
    //      type : 'category',
    //      data : ['1月','2月','3月','4月','5月','6月','7月','8月','9月','10月','11月','12月',],
    //      axisTick: {
    //        alignWithLabel: true
    //      }
    //    }
    //  ],
    //  yAxis : [
    //    {
    //      type : 'value'
    //    }
    //  ],
    //  series : [
    //    {
    //      name:'每月花费',
    //      type:'bar',
    //      barWidth: '60%',
    //      data:[995,666,444,858,654,236,645,546,846,225,547,356]
    //    }
    //  ]
    //};

    let option = {
      backgroundColor: "#0f375f",
      tooltip: {
        trigger: "axis",
        axisPointer: {
          type: "shadow",
        },
      },
      legend: {
        data: ["line", "bar"],
        textStyle: {
          color: "#ccc",
        },
      },
      xAxis: {
        data: category,
        axisLine: {
          lineStyle: {
            color: "#ccc",
          },
        },
      },
      yAxis: {
        splitLine: { show: false },
        axisLine: {
          lineStyle: {
            color: "#ccc",
          },
        },
      },
      series: [
        {
          name: "line",
          type: "line",
          smooth: true,
          showAllSymbol: true,
          symbol: "emptyCircle",
          symbolSize: 15,
          data: lineData,
        },
        {
          name: "bar",
          type: "bar",
          barWidth: 10,
          itemStyle: {
            borderRadius: 5,
            color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
              { offset: 0, color: "#14c8d4" },
              { offset: 1, color: "#43eec6" },
            ]),
          },
          data: barData,
        },
        {
          name: "line",
          type: "bar",
          barGap: "-100%",
          barWidth: 10,
          itemStyle: {
            color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
              { offset: 0, color: "rgba(20,200,212,0.5)" },
              { offset: 0.2, color: "rgba(20,200,212,0.2)" },
              { offset: 1, color: "rgba(20,200,212,0)" },
            ]),
          },
          z: -12,
          data: lineData,
        },
        {
          name: "dotted",
          type: "pictorialBar",
          symbol: "rect",
          itemStyle: {
            color: "#0f375f",
          },
          symbolRepeat: true,
          symbolSize: [12, 4],
          symbolMargin: 1,
          z: -10,
          data: lineData,
        },
      ],
    };
    myChart.setOption(option);

    window.addEventListener("resize", function () {
      myChart.resize();
    });
  },
};
</script>
